Eleven porcelain reference books, including Godden's 'Chamberlain Worcester', 'Pottery & Porcelain Marks', 'Coalport & Coalbrookdale', 'Minton Pottery', 'Mason's'; 'Lowestoft'; Twitchett's 'Derby Porcelain'; Barrett & Thorpe's 'Derby'; Barrett's 'Worcester', 'Lund's Bristol'; Smith's 'Liverpool Herculaneum'